Tenon-cutter.



H. E. FINNEY.

TENON CUTTER.

APPLICATION HLED MAR.18,1914.

1, 145,237. Patented July 6, 1915.

COLUMBIA PLANOGRAPM co., WASHINGTON. D. c.

" ticalsection showing one embodiment of lthei T0 all whomt't mayconcern: l, e

Be it knownthat-I, HENLRYQE. FINNELa citizen of the yUnited 4 States,residing at Chicago, in the c ountyvofCook and State 0f Illinois, haveinvented certain new; and yuseful Improvements in Al"enon-Cutters, of

which the following is a specification.

This inventionrelates to tools for cuttingv or trimming `tenons onwooden pins 'andthe like, ,and its. Objectis to ,provide a simple!` andefficient ltool of Ithis kind `whichis ad? j ustable for differentsized'teIlOIlS andwhich makes a smooth andaccirate job.

In the accompanying drawing part of `this specification, Figurel .is'averinvention; Fig.A 2V is an end view thereof partly broken away, andFig. 3 is a perspective view showing the cuttingbit ofythe device; Fig.4 is a planpviewjshowing an-` other embodiment of theinvention; Fig. 5is a cross-section onthe line 5`-`5"ofFig. 4,

and Figs.. 6and7 are elevations showing v.

provided with a transverse bore 12 lto re-` ceive the wo-rk. The headalso has a side extension 13` carryingacuttingbit 14. The

bottom ofthe'extension has a recessi'n whichA the bit seats andisheld'by a screw 1-5 passing through a"l slot 16 in the extension andscrewed into the bit. The cutting edge of n the bit `extendstangentially into the bore 12 through a slot 17 in thehead 11. The slot164 runs in the direction of the bore so that upon backing the screw 15the 4extent f. l

j worke'asierto insert if it is of the same dito which the bit projectsinto the bore may be varied according to the `depth -of 4the cutldesired. The rear end of the bit abuts` a ainst the heads of twoadjusting screws' 1 a threaded into the outer end of the eXtension 13,and serving to set the bit laterally.

As shown, the bit has a cutting edge' at each end so that it may bereversed.

' 18 is provided, the same being carried by one end ofV a screw stem 19which latter is screwed at its opposite end into a nut 20 rotatablymounted on the butt endof the speeiacatin of Letters Patent Aviitin medMrchiaijajm.: serein., "25

a..awww-f Shank? 1 0.and;iie1dggiginaf'trattiiii,the'fd rection Aof .itslength"` by ,ai pin 21 the shankfand' eXtendingvinto a circnmlfer;

entialv groove 22 in the vnut. -fUponfturningf bore 12, or'retracted,"in yobviojis manner. Theshank lOistubular,to-'accommodatethe? f isp/angular` ,inffcross-'secti'on' andy the'yrecess i in which; it Werks is orrsindhgly Shared? whereby' they fs'crewstein isA prevented from.

@the @niet @ad i;l

lockworkslv the` (recess in which.

Shoulder aelwich ein heipathbfan standing base: flavlig; ,lonf'ffthefblock, tofy limit the outward travelof-.the'block-. flange is circulara'ndhznsaslidingA fit in the hollow of the tovgidejthe screw". v v

Stem.' Theouterworking end-1- lof nietldck In operation, .the `workisinserted the bore 12, and turned, or the tool maybe turnedand the workheldv stationary. The

bit cuts the part to be vtrimmed perfectly round and of uniformdiameter. lAsthe'di-` in the bore. smooth and even cut.

j vIn order` that the work may not split where the lcut starts, thecutting edge of the bit 14 has-a slight bend V25 wat one end j outwardof .thesurfaceof the" work, this bend being located at the entrance'end'of the bore'12. `This end of the bore is flared i ameter as thebore.-

the invention. A block 28 is provided having Aa transverseworkfreceiving opening29into which the bit 30 carried by said block eX-tends. The reducing member ofthe opening slightly, as indicated at 26,which makes thel 1 957:. j

. Figs. 4 and 5 show anothef@mbo(ii-hmmt j. Y

29 is-a cylindrical plug 31 seatingin a re- `cess leading to saidopening. That'end of.

the plug which is adapted to be extended into the opening has a groovetofit the work. The plug is adjusted by anon-travcling screw 32threadedltherethrough, The

screw is held against travel in the direction of its length by a plate33 secured to the top of the block 28 over a shoulder 3411"@` on thescrew: On they bottom of the block 28 is mounted a retaining plate 35`for the plug 31. v

Fig. 6 shows another embodiment of the invention. Here the work isplaced between stationary and sliding jaws 36 and 37, respectively,saidjaws having opposite faces which are shaped to receive the work. Thesliding jaw 37 carries a bit 38. The stationary jaw is formed with aslideway 39 in' which the jaw 37 is mounted, adjustment of the latterbeing ee'cted a screw stem 40. s s

The modified tool shown in F 7 lcoinr prises aiixed jaw 41 anda ypivotedjaw 42,

the latter` carrying a bit 43. The fixed jaw has ears 44 to which Athejaw 42 is pivoted. The rear portion of the jaw -42jengages a conicalsurface 45 on a stern" '46 which is adjustable lengthwise by beingscrewed on a threaded st'e'ln 47 extending from the jaw 41. The jaw 42isswung toward the jaw 4l by advancing the cone, andupon retracting thesame, a spring 48 engaging the jaw 42 swings the same outward of the 4l.

Each of the bits in the modified structures has a bend at the startingend of the cutting edge for the purpose'hereinbefore described.

I claim:

l. A tenen cutter comprising a hollow shank having a bit carryingportion and a transverse bore into which the bit extends tangentially, anon-traveling nut carried by the shank, a screw stem threaded into thenut and passing through the hollow of the shank, said shank having arecess opening from the hollow to the aforesaid bore, and a blockcarried by the screw stem, said block seating in the recess and beingadjustable to extend into the bore.

2. A tenon cutter comprising a hollow shank having a bit carryingportion and a transverse bore into which the bit entends tangentially, anon-traveling nut carried by the shank, a screw stem threaded into thenutand passingthrough the hollow of the shank, said shank having ashoulder and a.. recess opening from the hollow to the aforesaid bore,and a block carried by the screw stern, said block seating inthe recessand being adjustable to extend into the bore, and the block having anoutstanding flange into the path of which the aforesaid shoulder extendsto limit the outward travel of the block.

In testimony whereof I a'lfiX vmy signature in presence of twowitnesses.

HENRY E. FINNEY.

Witnesses:

S. J. LEHRER, H. G. BATGHELOR.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, I). C.

